Issue 2.3
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PYXIS
System User Guide
reference signals. The controller uses the references to determine at what point to make a
crosspoint switch, in the absence of a valid reference signal a 'crash' switch will be implemented.
The 2449 has switches and headers which determine operation of the system and configuration of
user ports detailed in section 5.
NOTE: If the 2449 needs to be returned to Snell for any reason, DO NOT remove the 2445 sub
module, return both units together.
4.2.2 The System Database
Pyxis requires a 'configured' database; the router will be supplied with a basic database used during
system test before delivery. If necessary the database can be edited using the Nebula Editor
software (supplied with the Pyxis), it requires a PC running Microsoft Windows, a serial COM port
(RS232) and 3 wire pin-pin 9-way serial cable (refer to section 5.1.3 for details of cable wiring).
Refer to Nebula User Guide for more detail of connection, set up and operation.
4.2.3 Version Numbers
In order to accommodate the increased size of the Pyxis router the Nebula Control card and Editor
have been upgraded. Only version 3 (or higher) software will function with Pyxis. The simplest way
of checking the version installed on a PC is to run the editor and click on the Snell icon or select
'ABOUT' under the configuration dropdown, it should show Nebula Editor Version 3.2.0.88 or newer.
Figure 14: About Nebula Editor Screen Shot
